V-Tom: wow! Thanks for sharing that graph - it really tells the story.

I guess I get such crappy mileage in the car I never even noticed a 10% drop. On the bike, it's 10% of such a bigger number that I notice it- well, that, and there's that readout staring at me.

If the countries on the western side of the Atlantic paid the same prices as on the eastern side, then you'd be VERY aware of what your car / bike etc fuel consumption is. We pay about £1.30 a litre of fuel in the UK, places in mainland Europe pay even more, recently at YVR airport it was CAD 1.28 a litre (and I saw it at about CAD 1.20 out of town). And of course the happy thought is that just about all of our extra price is down to taxes

Sorry but that's not true. Cold air is denser so of course the FI system puts more fuel in the mix but more fuel and air provide more power. All other things being equal, that would mean smaller throttle openings would be required. Longer warm up times, denser air to punch through, winter gas formulas and thicker grease all contribute to lower mileage.

Sorry but that's not true. Cold air is denser so of course the FI system puts more fuel in the mix but more fuel and air provide more power. All other things being equal, that would mean smaller throttle openings would be required. Longer warm up times, denser air to punch through, winter gas formulas and thicker grease all contribute to lower mileage.

One other factor may be the pumps compensating for colder temperature. From what I understand the filling station's fuel pumps will pump less fuel in colder temperature than in warmer temperature. So if the station's pump says you put in 5 gallons you might have actually only recieved 4.7 gallons (I don't know that real amount so I am guessing at an actual number here.) In my nerdy graphs I have also noticed that the trip computer on my 2012 DL650 is more accurate in colder temperatures. In hotter weather it seems to be around the 93% accuracy (as in if I got 50mpg it would say 46.5 mpg) vs my real mileage, but as temperatures hover around freezing it seems to be closer to 97% of the real fuel mileage based on what is pumped. (And yeah I have a graph that shows the trip computer milelage vs the calculated mileage.)

Could that difference reflect the different amounts the gas Station compensates for Temperature?

Glad i caught this thread... Thought i was going nuts that i just magically lost 5-10mpg over night and a poorly running Wee. Guess its designed to run so lean that it really doesnt like cold temps. Never really had an issue (or noticed this) with any of my other bikes...

If the countries on the western side of the Atlantic paid the same prices as on the eastern side, then you'd be VERY aware of what your car / bike etc fuel consumption is. We pay about £1.30 a litre of fuel in the UK, places in mainland Europe pay even more, recently at YVR airport it was CAD 1.28 a litre (and I saw it at about CAD 1.20 out of town). And of course the happy thought is that just about all of our extra price is down to taxes

I used to go to the UK on business years back. I remember there being some minor buzz about the price approaching 99p because some of the older pumps didn't have enough decimal places to accomodate another digit.

If the people on the eastern side of the Atlantic had a chance to switch with us, I bet a lot of them wouldn't to save gas $.

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